Delhi-based NightStay, a mobile-based marketplace for last-minute hotel bookings, has raised an undisclosed amount in a pre-Series A round led by IAN and others. In August 2015, NightStay had raised $500,000 in a seed round from Vivek Bihani of Bedrock Venture Management Pvt. Ltd, Rajesh Sawhney, founder of GSF, and Shailesh Vikram Singh.